The border procedures at the Istanbul International Airports are not that complicated but follow strict rules. And if you’re a duty free fan, you’ll love Turkey. After you shopped duty free prior to boarding the plane, you’re also allowed to buy duty free goods after arriving in Istanbul. Although I’ve never been asked by the customs to open my suitcases, you better stick to the rules. So, if you don’t want to waste time at either check-point, follow the guidelines below.